How do I specify the color data as numeric or logical value?
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I'm currently using a code from github for fringe analysis. It works perfectly for the example image but when Im using .tif images with an 'indexed' colormap and RGB-palette I always get this error:
Error using image
Complex values are not supported. Specify the color data as numeric or logical values.
Error in imagesc (line 52)
hh = image(varargin{:}, 'CDataMapping', 'scaled');
Error in example (line 61)
imagesc(1 ./ freq);
How do I need to specify the colordata?
Heres the part from the code:
subplot(2, 2, 1);
im.resize(scale).plot();
title('test image');
subplot(2, 2, 2);
imagesc(1 ./ freq);
axis image;
colorbar;
set(gca, 'XTick', [], 'YTick', []);
title('apparent spacing, nm');
Regards,
M
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Respuestas (1)
DGM
el 18 de Abr. de 2022
I'm going to have to assume that freq or 1./freq are complex-valued. The arguments to image()/imagesc() need to be real-valued. How you choose to reduce the complex values depends on what your intentions are. You could look at only the components of the data
real(1./freq)
or
imag(1./freq)
or you could look at the magnitude
abs(1./freq)
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